mirror of https://github.com/proxmox/mirror_qemu
Merge remote-tracking branch 'mdroth/qga-pull-6-21-12' into staging
* mdroth/qga-pull-6-21-12: qemu-ga: add guest-fstrim command qemu-ga: make names more generic for mount list functionsmaster
commit
675658d97e
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@ -350,6 +350,26 @@
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{ 'command': 'guest-fsfreeze-thaw',
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'returns': 'int' }
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##
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# @guest-fstrim:
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#
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# Discard (or "trim") blocks which are not in use by the filesystem.
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#
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# @minimum:
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# Minimum contiguous free range to discard, in bytes. Free ranges
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# smaller than this may be ignored (this is a hint and the guest
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# may not respect it). By increasing this value, the fstrim
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# operation will complete more quickly for filesystems with badly
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# fragmented free space, although not all blocks will be discarded.
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# The default value is zero, meaning "discard every free block".
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#
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# Returns: Nothing.
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#
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# Since: 1.2
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##
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{ 'command': 'guest-fstrim',
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'data': { '*minimum': 'int' } }
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##
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# @guest-suspend-disk
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#
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@ -38,9 +38,12 @@ extern char **environ;
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#include <sys/socket.h>
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#include <net/if.h>
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#if defined(__linux__) && defined(FIFREEZE)
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#ifdef FIFREEZE
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#define CONFIG_FSFREEZE
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#endif
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#ifdef FITRIM
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#define CONFIG_FSTRIM
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#endif
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#endif
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void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
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@ -312,19 +315,18 @@ static void guest_file_init(void)
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/* linux-specific implementations. avoid this if at all possible. */
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#if defined(__linux__)
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#if defined(CONFIG_FSFREEZE)
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typedef struct GuestFsfreezeMount {
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#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
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typedef struct FsMount {
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char *dirname;
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char *devtype;
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QTAILQ_ENTRY(GuestFsfreezeMount) next;
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} GuestFsfreezeMount;
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QTAILQ_ENTRY(FsMount) next;
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} FsMount;
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typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList;
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typedef QTAILQ_HEAD(, FsMount) FsMountList;
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static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts)
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static void free_fs_mount_list(FsMountList *mounts)
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{
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GuestFsfreezeMount *mount, *temp;
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FsMount *mount, *temp;
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if (!mounts) {
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return;
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@ -341,10 +343,10 @@ static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts)
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/*
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* Walk the mount table and build a list of local file systems
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*/
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static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
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static int build_fs_mount_list(FsMountList *mounts)
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{
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struct mntent *ment;
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GuestFsfreezeMount *mount;
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FsMount *mount;
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char const *mtab = "/proc/self/mounts";
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FILE *fp;
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@ -367,7 +369,7 @@ static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
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continue;
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}
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mount = g_malloc0(sizeof(GuestFsfreezeMount));
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mount = g_malloc0(sizeof(FsMount));
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mount->dirname = g_strdup(ment->mnt_dir);
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mount->devtype = g_strdup(ment->mnt_type);
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@ -378,6 +380,9 @@ static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
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return 0;
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}
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#endif
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#if defined(CONFIG_FSFREEZE)
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/*
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* Return status of freeze/thaw
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@ -398,15 +403,15 @@ GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
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int64_t qmp_guest_fsfreeze_freeze(Error **err)
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{
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int ret = 0, i = 0;
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GuestFsfreezeMountList mounts;
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struct GuestFsfreezeMount *mount;
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FsMountList mounts;
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struct FsMount *mount;
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int fd;
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char err_msg[512];
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slog("guest-fsfreeze called");
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QTAILQ_INIT(&mounts);
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ret = guest_fsfreeze_build_mount_list(&mounts);
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ret = build_fs_mount_list(&mounts);
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if (ret < 0) {
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return ret;
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}
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@ -447,11 +452,11 @@ int64_t qmp_guest_fsfreeze_freeze(Error **err)
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close(fd);
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}
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guest_fsfreeze_free_mount_list(&mounts);
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free_fs_mount_list(&mounts);
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return i;
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error:
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guest_fsfreeze_free_mount_list(&mounts);
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free_fs_mount_list(&mounts);
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qmp_guest_fsfreeze_thaw(NULL);
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return 0;
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}
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@ -462,12 +467,12 @@ error:
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int64_t qmp_guest_fsfreeze_thaw(Error **err)
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{
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int ret;
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GuestFsfreezeMountList mounts;
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GuestFsfreezeMount *mount;
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FsMountList mounts;
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FsMount *mount;
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int fd, i = 0, logged;
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QTAILQ_INIT(&mounts);
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ret = guest_fsfreeze_build_mount_list(&mounts);
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ret = build_fs_mount_list(&mounts);
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if (ret) {
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error_set(err, QERR_QGA_COMMAND_FAILED,
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"failed to enumerate filesystems");
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@ -507,7 +512,7 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err)
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}
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ga_unset_frozen(ga_state);
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guest_fsfreeze_free_mount_list(&mounts);
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free_fs_mount_list(&mounts);
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return i;
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}
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@ -525,6 +530,65 @@ static void guest_fsfreeze_cleanup(void)
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}
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#endif /* CONFIG_FSFREEZE */
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#if defined(CONFIG_FSTRIM)
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/*
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* Walk list of mounted file systems in the guest, and trim them.
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*/
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void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
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{
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int ret = 0;
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FsMountList mounts;
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struct FsMount *mount;
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int fd;
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char err_msg[512];
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struct fstrim_range r = {
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.start = 0,
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.len = -1,
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.minlen = has_minimum ? minimum : 0,
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};
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slog("guest-fstrim called");
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QTAILQ_INIT(&mounts);
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ret = build_fs_mount_list(&mounts);
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if (ret < 0) {
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return;
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}
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QTAILQ_FOREACH(mount, &mounts, next) {
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fd = qemu_open(mount->dirname, O_RDONLY);
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if (fd == -1) {
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sprintf(err_msg, "failed to open %s, %s", mount->dirname,
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strerror(errno));
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error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
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goto error;
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}
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/* We try to cull filesytems we know won't work in advance, but other
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* filesytems may not implement fstrim for less obvious reasons. These
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* will report EOPNOTSUPP; we simply ignore these errors. Any other
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* error means an unexpected error, so return it in those cases. In
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* some other cases ENOTTY will be reported (e.g. CD-ROMs).
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*/
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ret = ioctl(fd, FITRIM, &r);
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if (ret == -1) {
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if (errno != ENOTTY && errno != EOPNOTSUPP) {
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sprintf(err_msg, "failed to trim %s, %s",
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mount->dirname, strerror(errno));
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error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
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close(fd);
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goto error;
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}
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}
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close(fd);
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}
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error:
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free_fs_mount_list(&mounts);
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}
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#endif /* CONFIG_FSTRIM */
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#define LINUX_SYS_STATE_FILE "/sys/power/state"
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#define SUSPEND_SUPPORTED 0
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#define SUSPEND_NOT_SUPPORTED 1
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@ -918,7 +982,15 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err)
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return 0;
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}
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#endif /* CONFIG_FSFREEZE */
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#if !defined(CONFIG_FSTRIM)
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void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
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{
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error_set(err, QERR_UNSUPPORTED);
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return;
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}
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#endif
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/* register init/cleanup routines for stateful command groups */
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@ -173,6 +173,17 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err)
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return 0;
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}
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/*
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* Walk list of mounted file systems in the guest, and discard unused
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* areas.
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*/
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void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
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{
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error_set(err, QERR_UNSUPPORTED);
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return;
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}
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typedef enum {
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GUEST_SUSPEND_MODE_DISK,
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GUEST_SUSPEND_MODE_RAM
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